<template>
  <div>
      <h4>第四题</h4>
      <p>
          function copy(target){<br>
            // ...在这里补充代码<br>
            return [...target]<br>
            }<br>
            let arr = [1, 2, 3, 4, 5]<br>
            let brr = copy(arr);<br>
            arr.push(100);<br>
            console.log(brr); // [1, 2, 3, 4, 5]<br>
        </p>
  </div>
</template>

<script>
export default {
}
</script>

<style>

</style>
